Holder for roll of tape



Jan. 25, 1955 www |ii li 2 Sheets-Sheet IN VEN TOR.

A T TORNE YS.

Jan. 25, 1955 F. MocoRMlcK HOLDER FOR ROLL oF TAPE Filed April s, 195o I I FRANK MCCORMICK FIG. 7.

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I I I United States Patent HOLDER Fon ROLL oF TAPE Frank McCormick, Nyack, N. Y., assignor to Federal Carton Corporation, North Bergen, N. J., a corporation of New York Application April s, 1950, serial No. 154,808

4 Claims. (ci. 20s-6s) This invention relates to an improved holder for rolls of tape such as masking tape and other re-usable tapes.

Such tape is commonly wound in cylindrical form on a hollow card-board center core. The tape is frequently sensitive to pressure thereon and deteriorates from such pressure. This raises diculties in the shipment and handling thereof.

In order to meet these diiculties, it is preferable to pack each roll of tape in its carton in such a manner that the longitudinal side wall of the roll is prevented from abutting the side walls of the carton. sible to design a special carton with flaps which cooperate with the core of the roll of tape and prevent it from touching the sidewalls of the carton. However, such a construction is not satisfactory when it is desired to pack a plurality of rolls of tape in one carton and furthermore the roll of tape is subject to undue handling when it is removed from the carton.

According to the invention, there is provided an individual holder insert for each roll of tape. The holder comprises a base member with a pair of integral iaps. When the base member is placed in abutment with one of the faces of the roll of tape, these aps may be positioned within the center core in abutment with the inner wall thereof. lThe aps are so constructed that the roll is permitted to turn, but sideways movement thereof is inhibited. As a result, by making the size of the base greater than the size of the end face of the roll, it is possible to prevent the longitudinal wall of the roll from touching the side wall of any carton in which the holder and roll might be placed. Furthermore, the roll may be unrolled without removing it from its holder.

Each roll of tape may be provided with a single holder,v

or the roll may have two holders, each abutting a respective face of the roll. The use of two holders may be advisable in the case of the larger and heavier rolls of tape.

After the rolls of tape have been mounted on the holder inserts, the rolls may be packed in individual cartons, or a plurality of rolls may be placed in one carton. When the roll is individually packed, it is possible to unroll it without removing it from the carton. In any event, a roll of tape may be removed from a carton without detaching it from its holder, and as a result undesirable handling of the roll itself is held to a minimum.

The construction of the separate holder of this invention is more economical than the construction of a special carton. The holder insert may be used with a conventional carton. Furthermore, it is frequently desirable to wax any surface which comes into contact with the face of the roll in order to facilitate unrolling of the roll. It is more economical to wax the holder blank than to wax a carton blank, since considerable portions of the carton cannot come into contact with they face of the roll, and waxing of those portions is wasteful.

Other objects and advantages of this invention will be apparent from the following description and the annexed drawings, in which preferred embodiments are disclosed.

In the drawings,

Fig. 1 is a plan view showing a roll of tape mounted on a holder insert;

Fig. 2 is a section on line 2-2 of Fig. l;

Fig. 3 is a view similar to Fig. 2, although reduced in scale, showing a plurality of rolls of tape mounted on holders and stacked;

8 Fig. 4 is a vertical section showing a roll of tape It is pos- 1 2,700,463 Patented Jan. 25, 1955 ICC mounted on upper and lower holders and packed in a carton;

Fig. 5 is a section on line 5-5 of Fig. 4;

Fig. 6 is a view similar to Fig. 3, showing a plurality of rolls of tape mounted on holders and being packed in a carton, the holders having respective apertures therein for reception of a mandrel;

Fig. 7 is a fragmentary vertical section of the improved holder, showing a score line formed by means of male and female dies; and

Fig. 8 is a view similar to Fig. 7, showing a score line formed by means of a male die and a at die.

Upon reference to the drawings in detail, and in particular to Figs. l and 2, it will be seen that the improved holder comprises a base 10 with a pair of integral flaps 11 which are adapted to be nteritted with a roll of tape 12.

This tape roll 12 is conventional and comprises tape of any suitable type, which is wound in layers around center core 14. This core 14 is generally made of cardboard or other suitable material and is cylindrical in shape with open ends. Tape roll 12 is also cylindrical in shape with substantially parallel and planar end faces.

The invention is particularly useful when tape roll 12 is a masking tape or other type of tape which is sensitive to pressure thereon. This is because the holder tends to prevent the longitudinal side wall of roll 12 from coming into contact with the wall of any containe in which said roll 12 might be placed.

The holder is preferably punched from a single blank, with aps 11 integral with base member 10. This blank may be made of a suitable material which is relatively inexpensive, and which is stii but permits suflicient articulation of aps 11. Such a material may be one of a number of types of paper board, including kraft board, fibre board, corrugated board and cardboard. Board made with vulcanized bre may also be used.

When the blank is made of solid kraft, a thickness of 0.028 inch has been found sufficient for commercial types of tape of a roll thickness up to 2 inches. Above that thickness, it is preferred to use board of about 0.042 inch thickness.

The above materials have been listed for illustrative purposes only, and the invention is not limited to those materials, nor to the illustrative thicknesses of the blank as listed above.

The blank may be unfinished, but it is preferably coated or impregnated with wax or other suitable material to prevent roll 12 from sticking to base 10 by reason of the exuding from between the layers of the tape of the rubber adhesive compositions used in making pressure sensitive tapes. Any suitable material may be used to make this exuded adhesive material non-adherent to the surface of base 10. Each surface of base 10 should be so treated if it is to be placed in abutment with an end face of a tape roll 12.

One important advantage of this treatment of the blank with wax is that it permits free turnability of roll 12 with respect to base 10.

Base 10 may be of any desired size and shape, so long as roll 12 nowhere protrudes over the edge of said base 10 when mounted thereon. Base 10 may be square with rounded corners, as clearly shown in Fig. l, or round as clearly shown in Fig. 5. However, the invention is not limited to these shapes of base 10.

Flaps 11 oppose each other and are respectively cut out from base 10 and connected thereto by means of respective hinge lines 13. These hinge lines 13 are so formed that flaps 11 tend to return to the plane of base 10 when their detached peripheral edges 17 are held away from said plane. Hinge lines 13 are preferably parallel and equidistant from the center of base 10. The edges 17 are respectively convex and shaped in the form of an arc of a circle. Respective apertures 15 are formed in base 10 by reason of the cutting out of respective flaps 11.

In order to assemble the holder with tape roll 12, aps 11 are pushed outwardly from base 10 and inserted through core 14. One face of roll 12 is brought to rest 0 against base 10, in which position the ends of respective hinge lines 13 respectively approximately abut the inner In practice, the ratio between h and the height or thickness of core 14 depends upon a compromise between the above broad considerations. -The factors determining the ratio include, but are not necessarily limited to, the dimensions of core 14, the weight of roll 12, the distance m between score lines 13, the manner in which score lines 13 are formed, the material of which the holder is made, anld whether or not holders are applied to both faces of ro 12.

Once the value of h has been selected, as a result of consideration of the above factors, it is possible to determine the dimensions of aps 11 by means of Equations 1 and 2. f

For example, Figs. l and 2 have been drawn to exact scale for the construction in which the diameter d of core 14 is 3 inches, and its height is 1% inch. The distance LN, or h, has been selected as 1%; inch, or half the height of core 14; but it is to be understood that this value of h is illustrative only, since h must be determined on the basis of the factors listed above. The distance m between score lines 13 is one inch. A s a result, from Equation l it is seen that the distance MN, or p, is1.07 inches; and the length n of each score line 13 is 2.83 inches. The shape of edge 17 is that of the arc KNK of a circle extending through point N and at the ends of score line 13.

The dimensions of the holder shown in Figs. 1 and 2 agree substantially with those calculated, making allowance for deviations caused by the thickness of score lines and of cut lines. Each edge 17 approximately conforms in shape along substantially its entire length to the shape of the inner wall of core 14. Any slight divergencies in tit are compensated for by the thickness and limited deformability of ap edge 17.

Similarly as in the above example, the dimensions of aps 11 can be suitably chosen for any diameter and height of core 14. Flaps 11 will resist lateral movement of roll 12 with respect to base 10, but since edges 17 conform to the wall of core 14, said roll 12 is freely turnable on the holder. As a result, roll 12 may be used with minimum direct handling thereof.

It has been found good practice for certain tape rolls to apply holders to each face thereof. This is shown in Figs. 4 and 5, in which identical holders, as described above, are shown respectively applied to the upper and lower end faces of tape roll 12. Such an arrangement is particularly useful in the case of heavier rolls of tape, such as commercial rolls having a height of 2 inches and greater. In that case, since the value of h is limited to approximately inch, the ratio of h to the height of core 14 is unfavorable when only a single holder is used. The use of two holders adds structural strength.

The tape roll 12, together with either one or two holders mounted on its respective end faces, may be packed in individual cartons. This is shown in Figs. 4 and 5, in which roll 12 is packed in carton 20.- Base 10 and flaps 11 hold roll 12 spaced from the side walls of said carton 20.

When this method of packing is used, roll 12 may optionally be unrolled without its being removed from carton 20. Figs. 4 and 5 show closure ap 21 in its open position and the end 12a of roll 12 extending outside carton 20. Since flap edges 17 substantially conform to the shape of the wall of core 14, said Wall of core 14 can turn with respect to flaps 11. Vertical movement of roll 12 is limited by the upper and lower walls of carton 20.

Optionally, as shown in Figs. 4 and 5, base 10 may be round, and this is advantageous if for some reason roll 12 does not turn freely with respect to flaps 11. In that case, base also turns, and roll 12 unrolls freely. Base 10 may also be of suitable polygonal or other shape so that it turns freely in carton 20.

Besides being packed individually, a plurality of tape rolls 12, each mounted either on a single holder or on two holders, may be packed in a single carton. This is clearly shown in Figs. 3 and 6.

Fig. 3 shows a plurality of holders, each having a tape roll 12 mounted thereon, packed in carton 16. The outline of this carton 16 is shown in broken lines since it may be of any conventional type. Preferably, the side walls of carton 16 abut the side edges of base 10 to prevent lateral movement thereof. Also, the top wall of carton 16 abuts the top of the uppermost roll 12, or optionally suitable spacers are placed in the top of said carton 16.

Fig. 6 shows a carton 16a whose top ap 17 is in its open position. Two rolls 12 have been packed in this carton 16a by means of mandrel 18, and a third roll 12 is in the process of being packed. v

This mandrel 18 and the parts associated therewith 'are not shown in detail. Mandrel 18 is preferably cylindrical and is initially placed in carton 16a with its lower end extending through aperture 19 in the base of said carton 16a. In this modification, aperture 24 is provided in the center of each base' 10, whereby the holders may be dropped over mandrel 18 into carton 16a. After carton 16a has been packed, mandrel 18 may be removed.

Figs. 7 and 8 show alternate types of score lines 13. In Fig. 7, said score line 13 is formed by applying respective female and male dies to the respective upper and lower faces of base 10. As a result, a ridge 23 is formed in the upper fa-ceof base 10, and a parallel groove 22 is formed directly beneath this ridge 23 in the lowerface of base 10. Groove 22 and ridge 23 together define score or hinge line 13. This results in a spring-like action tending to return flap 11 to the plane of base 10 when this iiap 11 is lifted to the position of Fig. 7. As a result, flaps 11 grip the wall of core 14 and are not readily lifted upward by lateral force on roll 12.

The construction of Fig. 8 may optionally be employed when a m-ore intensified spring-like action on aps 11 is desired. In this construction, a fiat die, instead of a female die, is applied to the upper surface of base 10, and as a result ridge 23 is eliminated.

Preferred embodiments of the invention, as well as various changes, omissions, substitutions and variations which can be made therein, have lbeen disclosed. Numerous other changes, omissions, substitutions an-d variations can be made without departing from the scope and spirit of the invention.

Edge 17 need not be an arc of a circle and optionally may `have any suitable shape approximately corresponding to the shape of the arc KNK of the ellipse which is the intersection with the inner wall of core 14 of the plane defined by line 13 and point N.

The improved holder may be used with rolls of tape, including pressure-sensitive tape, and with other types of rolls, Such as r-olls of ribbon. Any roll can be used, so long as it has an end wall and an opening communicating witlll that end wall, said opening having acylindrical side wal What is claimed is:

l. In combination with a roll which has a cylindrical bore which has a rigid side wall, and an end wall .which is transverse to the axis of said bore, said bore extending through said end wall, a holder comprising a planar base which abuts said end wall, and a pair of opposing cutout planar aps which are connected to said base by means of parallel scored hinge lines of the same length, said flaps being inclined outwardly from said respective hinge lines at an acute angle wit-h respect to said vbase and being positioned within said bore, the respective ends of said hinge lines being proximate t-o said side wall, said hinge lines being so formed as to exert a force on said flaps tending to return them to the plane of said 'base and thereby maintaining their detached peripheral edges in abutment with said .side wall, the detached peripheral edge of each said ap being in the shape of a minor arc of a circle having the hinge line of said flap for a chord, the maximum distance from said hinge line to said detached peripheral edge exceeding the distance between said hinge line and said side wall and being less than or, at most, equal to one half the length of said hinge line, each said detached peripheral edge approximately corresponding to the curve of intersectionvof the plane of said ap with the inner face of said side wall, whereby said aps resist lateral movement of said roll with respect to said lbase but permit said roll to turn about the axis of said opening with respect to said base.

2. A combination in accordance with claim 1, in which the entire peripheral edge of said base extends beyond the longitudinal outer surface of said roll.

3. In combination with a roll which has a cylindrical bore which has a rigid side wall, and an end wall which is transverse to the axis of said bore, said bore extending through said end wall, a holder comprising a planar base which abuts said end wall, and a pair of opposing cutout planar flaps which are connected to said base by means of parallel scored hinge lines of the same length,

saiid ifiaps rbeing inclined 1ouioivardiy from said respective hinge lines :at an .acme angie with :fespect to :said base and ibeing :positioned 'within said bore, che :respective ends of said hinge lines being proximate to said side Wall, said hinge lines :being Iso form-ed as to exert a force on said :aps 'tending to netmn them :te :the plane of :said base land ihereby maintaining :their 'detached peripheral edges in iabut-ment iwith said side wa'lL (the detached peripher'all edge of each said :ap bein-g convex `and being symmetrical `.with yrespect to the perpendicular bisecting line with-in said ap .of l:said hinge line, :the Amaximum distance from fsaid hinge line to :said vdetached `peripheral edge exceeding the distance between said hinge line and said side wall and :being less than on Yat most, equal to one fl'rali the lengt-h of vsaid hinge line, each ysaid -detached peripheral edge fappnoximately 1cm-,responding t0 the curve of intersection `of the Yplane of said ap with .the inner face of said side wail, :whereby said flaps resist lateral movement of said roll .withiespeet 'to Asaid -base but permit said irOl'l te tum abeut the ,axis ief said 'Opening with Iespteci :to ,said base.

4. cemhinatien :in aecerdanee with e1aim3J in which the en-.tire peripheital edge ,of Vsaid ,base extends beyond the Vlongitudinal guter vsuriaceof -said i011.

References Cited in the le 4of this patent UNITED STATES PATENTS Re. 20,899 Scholi Oct. '25, 41938 1,560,938 L1m=d Nov. 10, 1925 1,562,196 Albi-ams NOV. 17, 1925 1,889,933 Pratt Dec. 6, 19,32 2,034,809 Granit Mai'. 24, 1936 2,338,930 .Gordon Jan. 11, 1944 FOREIGN 'PATENTS 396,689 Great Britain i. `Ju1y 31, 19,33 

